found this on one of the thread on AEM intakes originally posted on this thread
People w/ AEM CAI, Help
The AEM CAI made a huge difference on my Stage 0 car over the stock air box.
Yes, it did hit the hood at first, the key is to get the tube as low as possible. I did the following to make it work without any issues:
1. Loosen the battery holdown & slide the battery as far as possible to the left fender, then re-tighten the holdown. This gives more clearance between the battery & the valve cover.
2. Re-route the brake booster vacuum line to get it well below the intake tube. This allows the tube to go lower.
3. Do not attach the valve cover breather tube to the intake tube. Instead get a piece of 3/8" hose and any $2 breather filter/sponge. Attach this to the valve cover breather. This accomplishes 3 things: a) Eliminates a potential oil source from the intake, b) Allows the intake tube to sit lower. and c) Still gives the valve cover breather a fresh air source. Attaching the breather line pulls the tube up higher, causing to hit the hood. I capped the intake tube inlet & the nipple rests against the top of the valve cover.
4. Do not mount the tube support brace to the top of the battery bracket using the rubber mount. I was able to wedge the support below the bracket. Again, this lowered the overall tube height, while still providing the needed support.
I spent a lot of time to figure all of this out. But it was well worth the time! The last thing I did was removed the IAT sensor & plugged the hole. The CAI tube is always cold to the touch, even after extended hard runs. I didn't wanted the ECM to sense the colder intake temp, so I placed the sensor between the relay box & the battery blocking it from airflow & exposing it to warmer underhood temperatures. I'm now getting 13-14 psi boost instead of 11-12 psi.
I can take some pictures if you need to see more detail. I hope this helps....